/*
 * Copyright (C) 2022 Vincent Wei (<https://github.com/VincentWei/>)
 *
 * This is a part of Vincent's online course:
 * [the Best Practices of C Language](https://courses.fmsoft.cn/best-practices-of-c/)
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h>
#include <assert.h>

#define CSTR_HELLO  "hello, world!"

static void access_out_of_range(unsigned int range)
{
    const char *hello = CSTR_HELLO;
    char *buff;

    buff = malloc(sizeof(char) * 4);

    if (range > sizeof(CSTR_HELLO)) {
        printf("Going to memset %d bytes\n", range);
        memset(buff, 0, range);
    }
    else {
        for (int i = 0; i < range; i++) {
            buff[i] = hello[i];
        }

        for (int i = 0; i < range; i++) {
            putchar(buff[i]);
        }
        puts("");
    }

    free(buff);
}

int main(void)
{
    unsigned int range = 8;

    for (; range < UINT_MAX; range *= 2) {
        access_out_of_range(range);
    }

    return EXIT_SUCCESS;
}

